使用发布/订阅模型在Ionic 2中推送通知

问题描述

我正在使用插件来执行推送通知Ionic 2 Chat App。

我已根据，它可以工作，但只能在同一台设备上运行。即如果你提供设备令牌，它会向手机发送通知。

我的问题是聊天应用，我需要一个 PubSub 模型。这样用户就可以发布主题，而另一个用户可以订阅该主题，即使它们处于不同的决定。

查看，似乎有可能。参见 android.topics 和 ios.topics 。

所以我尝试以下内容：

Javascript客户：

发布

  let push = Push.init（{
 android：{
 senderID：xxxxxxxx，
主题：[ 'foo'] 
}，
 ios：{
 alert：true，
 badge：false，
声音：true，
主题：['foo'] 
}，
 windows：{} 
}）; 
 
 push.on（'registration'，（data）=> {
 //调用Java Server 
让我们承诺：Promise< string> = this.notificationService.push （data.registrationId，'这是来自Ionic Chat的测试消息'）; 
 promise.then（（data）=> {
 
}）; 
}）; 
  

Java服务器：

 尝试{
 System.out.println（NotificationService：device_token：+ device_token）; 
 logger.info（NotificationService：device_token：+ device_token）; 
 //准备包含GCM消息内容的JSON。发送什么以及发送到何处。 
 JSONObject jGcmData = new JSONObject（）; 
 JSONObject jData = new JSONObject（）; 
 jData.put（title，This is title）; 
 jData.put（message，message）; 
 jGcmData.put（to，device_token）; //< =====这是问题????它是来自客户端的data.registrationId 
 //在GCM消息中发送什么。 
 jGcmData.put（data，jData）; 
 //创建连接以发送GCM消息请求。 
网址url =新网址（https://gcm-http.googleapis.com/gcm/send）; 
 HttpURLConnection conn =（HttpURLConnection）url.openConnection（）; 
 conn.setRequestProperty（授权，key =+ API_KEY）; 
 conn.setRequestProperty（Content-Type，application / json）; 
 conn.setRequestMethod（POST）; 
 conn.setDoOutput（true）; 
 //发送GCM消息内容。 
 OutputStream outputStream = conn.getOutputStream（）; 
 outputStream.write（jGcmData.toString（）。getBytes（））; 
} catch（例外e）{
 e.printStackTrace（）; 
} 
  

Javascript客户：

订阅

  let push = Push.init（{
 android：{
 senderID：xxxxxxxx，
主题：['foo'] 
}，
 ios：{
 alert：true，
 badge：false ，
声音：真实，
主题：['foo'] 
}，
 windows：{} 
}）; 
 
 push.on（'notification'，（data）=> {
 
}）; 
  

它适用于同一台设备，但如果则无效发布者和订阅者在不同的设备上。

我认为问题可能是即使其他用户订阅了我发布的主题，它仍然只发布到数据。 registrationId （设备令牌）。

请参阅Java服务器上的以下行：

  jGcmData.put（to，device_token）; 
  

问题

我认为答案是：

 to：/ topics / foo-bar，
  

但是如何为多个主题设置格式？ （这只是一个主题 foo-bar ）

解决方案

需要更改要发送到主题而不是设备的Java Server：

  jGcmData.put（to，/ topics / +主题）; 
  

参见：

I am using the phonegap-plugin-push plugin to do Push Notifications in an Ionic 2 Chat App.

I've implemented it according to the documentation, and it works, but only on the same device. i.e. it sends a notification to the phone if you supply its device token.

My issue is for a chat app, I need a PubSub model. So that a user can publish to a topic and another user can subscribe to that topic even if they are on different decices.

Looking at the documentation, it seems to be possible. See android.topics and ios.topics.

So I try the following:

Javascript Client:

publish

    let push = Push.init({
      android: {
        senderID: "xxxxxxxx",
        topics: ['foo']
      },
      ios: {
        alert: "true",
        badge: false,
        sound: "true",
        topics: ['foo']
      },
      windows: {}
    });

push.on('registration', (data) => {
  // call the Java Server
  let promise: Promise<string> = this.notificationService.push(data.registrationId, 'This is a test message from Ionic Chat');
  promise.then((data) => {

  });
});

Java Server:

try {
    System.out.println("NotificationService: device_token: "+device_token);
    logger.info("NotificationService: device_token: "+device_token);
    // Prepare JSON containing the GCM message content. What to send and where to send.
    JSONObject jGcmData = new JSONObject();
    JSONObject jData = new JSONObject();
    jData.put("title", "This is title");
    jData.put("message", message);
    jGcmData.put("to", device_token);  // <===== is this the problem???? it is the data.registrationId from the client
    // What to send in GCM message.
    jGcmData.put("data", jData);
    // Create connection to send GCM Message request.
    URL url = new URL("https://gcm-http.googleapis.com/gcm/send");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestProperty("Authorization", "key=" + API_KEY);
    conn.setRequestProperty("Content-Type", "application/json");
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);
    // Send GCM message content.
    OutputStream outputStream = conn.getOutputStream();
    outputStream.write(jGcmData.toString().getBytes());
} catch (Exception e) {
    e.printStackTrace();
}

Javascript Client:

Subscribe

    let push = Push.init({
      android: {
        senderID: "xxxxxxxx",
        topics: ['foo']
      },
      ios: {
        alert: "true",
        badge: false,
        sound: "true",
        topics: ['foo']
      },
      windows: {}
    });

    push.on('notification', (data) => {

    });

It works on the same device, but it doesn't work if the publisher and subscriber are on different devices.

I think the problem may be that even though another user is subscribed to the topic I publish to, it is still only publishing to the data.registrationId (Device Token).

See the following line on the Java Server:

jGcmData.put("to", device_token);

Question

Does anyone know how to make it send to all subscribers on that topic?

I think the answer is here:

"to": "/topics/foo-bar",

But how should this be formatted for multiple topics? (that's just one topic foo-bar)

解决方案

Need to Change the Java Server to send to the topic instead of the device:

jGcmData.put("to", "/topics/"+topics);

see: https://developers.google.com/cloud-messaging/

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